Eyeliner is a kind of traumatic skin coloring technique. Pigment particles easily spread to the vicinity of the meibomian glands and block the openings of the meibomian glands, thereby causing MGD and inflammation of the eyelid margin. The Kanghua dry eye analyzer can objectively analyze the opening of the meibomian gland and the shape of the eyelid margin, which is helpful for the diagnosis of MGD.